The Girl Next Door

Charlotte Stevens is the new girl.
She is buying businesses and is trying to over-come her boredom of normal life.
She is twenty five and has moved from her family farm and has moved to 221B Baker street.
Soon she meet's her neighbours, Dr. Watson and the famous Sherlock Holmes.
But soon, after settling in, thing's become more and more intense with hired assassins and fist fight's to breaking and entering her apartment.
Soon, she has to take a new level of caution as a threat starts to appear.
But, where's Sherlock when she needs him?
He is ignoring her, well, that is until he nearly get's her killed.
So, the trio stick together to take out the threat, but what is the threat exactly?